proc openParser(p: var Parser; fileIdx: FileIndex; inputstream: PLLStream;
                cache: IdentCache; config: ConfigRef) {.
    ...raises: [IOError, Exception, ValueError, ERecoverableError, KeyError],
    tags: [ReadIOEffect, RootEffect, ReadDirEffect, WriteIOEffect].}

proc parseFile(fileIdx: FileIndex; cache: IdentCache; config: ConfigRef): ParsedNode {.
    ...raises: [Exception, ERecoverableError, IOError, ValueError, KeyError],
    tags: [RootEffect, ReadIOEffect, ReadDirEffect, WriteIOEffect].}

proc setupParser(p: var Parser; fileIdx: FileIndex; cache: IdentCache;
                 config: ConfigRef): bool {.
    ...raises: [Exception, ERecoverableError, IOError, ValueError, KeyError],
    tags: [RootEffect, ReadIOEffect, ReadDirEffect, WriteIOEffect].}